Quick Disconnect Coupling Preferred Direction

[cmcbain]

I use a lot of self sealing quick disconnects (Hansen brand mostly). One of my coworkers says that there is a preferred direction of flow through these couplings (i.e. female to male flow is better than male to female). I have never heard of this and cant find any guidance to support the claim. Further, the internals of the couplers are identical, so I can't see how it would make a difference what direction the fluid flowed through them. I suppose there could be other reasons, like sealing upon disconnection, but I honestly can't imagine how one flow direction could be different from the other.

Has anyone out there ever heard of a reason to prefer flow through a coupling in a specific direction?

 

[hydtools]

Our method was male to female. The male is stronger, better tolerate full pressure when disconnected.

Ted

 

[btrueblood]

We always tried to have the hose side be female, and male side on mounted equipment. The idea was that the female side was somewhat better protected against damage by being dropped or stepped on. Flow wise, I've never seen a difference in flow resistance for the direction of the coupling, but it wouldn't surprise me if there was. Should be pretty easy to test it.